Refactor: Remove background task management and related hooks

- Deleted `useBackgroundTasks.ts` hook and its associated logic for managing background tasks.
- Removed `backgroundTaskManager.ts` service and all related task definitions and registrations.
- Cleaned up `Podfile.lock` and `package.json` to remove unused dependencies related to background tasks.
- Updated iOS project files to eliminate references to removed background task components.
- Added new background fetch identifier in `Info.plist` for future use.

package.json

@@ -27,8 +27,6 @@
     "dayjs": "^1.11.13",
     "expo": "~53.0.20",
     "expo-apple-authentication": "6.4.2",
-    "expo-background-fetch": "^13.1.6",
-    "expo-background-task": "~0.2.8",
     "expo-blur": "~14.1.5",
     "expo-camera": "^16.1.11",
     "expo-constants": "~17.1.7",
@@ -44,7 +42,6 @@
     "expo-status-bar": "~2.2.3",
     "expo-symbols": "~0.4.5",
     "expo-system-ui": "~5.0.10",
-    "expo-task-manager": "^13.1.6",
     "expo-web-browser": "~14.2.0",
     "lodash": "^4.17.21",
     "lottie-react-native": "^7.3.4",
@@ -80,4 +77,4 @@
     "typescript": "~5.8.3"
   },
   "private": true
-}
+}